--- a/src/mysql_plugin.h
+++ b/src/mysql_plugin.h
@@ -22,8 +22,10 @@
 /* includes */
 #if defined HAVE_MYSQL_H 
 #include <mysql.h>
+#include <mysql_version.h>
 #else
 #include <mysql/mysql.h>
+#include <mysql/mysql_version.h>
 #endif
 
 /* prototypes */
